Simrad SP70 - Expansion

Menu description
145
850--164186 A
Expansion
The Expansion button is located in the EchoView index menu and
activates the corresponding submenu.
Figure 142 -
Expansion submenu
The Expansion function is used to expand the echo view around
the trawl symbol or the bottom. To expand around the bottom, an
external echosounder must be connected.